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Class: CEPHALOPODA
--- Taxon Tree: AMMONOIDEA [Subclass]-AMMONITIDA [Order]-STEPHANOCERATOIDEA [Superfamily]
------ Family: SPIROCERATIDAE Hyatt, 1900 † (Sea) (FOSSIL)
DB counters=12, Genus=2, Subgenus=0, Species=8, Subspecies=0, Synonyms=1, Images=5
DB counters include Fossil taxa: Species=8, Subspecies=0
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annulatum, Spiroceras annulatum (Deshayes, 1835) † (FOSSIL)
fourneti, Spiroceras fourneti Roman & Petoraud, 1927 † (FOSSIL)
mixtecum, Parastrenoceras mixtecum Ochoterena, 1963 † (FOSSIL)
oaxacanum, Parastrenoceras oaxacanum Ochoterena, 1963 † - syn of: Parastrenoceras tlaxiacense Ochoterena, 1963 † (FOSSIL)
orbignyi, Spiroceras orbignyi (Baugier & Sauzé, 1843) † (FOSSIL)
tlaxiacense, Parastrenoceras tlaxiacense Ochoterena, 1963 † (FOSSIL)
toxoconicum, Spiroceras toxoconicum Buckman † (FOSSIL)
waltoni, Spiroceras waltoni (Morris) † (FOSSIL)
zapotecum, Parastrenoceras zapotecum Ochoterena, 1963 † (FOSSIL)
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